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@interviens @anni @frn IMPROVEMENT IN PUMPS.

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TO ALL WHOM IT MAY CONCERN:

Be it known that I, E. B. WINSHIP, of Racine, in the county of Racine, and State of Wisconsin,l have invented a new and useful Improvement in Pistons for Pumps; and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the annexed drawings'and letters of referencemarked thereon, making a part of this specification, in which- Figurelis anelevationvof my pump-piston, including a section of the pump-stock in which the piston operates.

Figure-2 is a plan view of the packing.

Figure 3 is a perspective representation of thepiston withthe packing removed.

The object of my invention is to improve David S. Woods piston, patented July 10, 1866, which consists in atwopart packing operating in an nlarged=annularspace or groove. And its nature consists in so arranging the piston that no check-valve is required, in consequence of making openings through the upper rim of the piston, through which the water passes upward, outside of the annular space. And further, in atta/ching ribs to the back of the annular space for the purpose of keeping the packing at every point an equal distance from the centre of. the piston and in making curved depressions in the edge of the lower flange for the purpose of allowing the water to pass between the packing and the annular space, when thepiston is forced downward. By this arrangement a very great improvement is made on Woods piston, so much so that nothing is retained of his device-except the two-part packing and the space in which it works. And further, the cost of a checkvalve is dbviated, from the fact that the packing is made to answer both the purpose of preventing the raising column of water from passing downwardat its external or intern al surface. Another advantage is gained by the use of my piston, as the enlarged part of the pump-stock need not be more than one-half of the usual length, thus making a saving of material and'labor.

A shows a section of the cylindrical pump-stock, in which the piston, C, is supposed to operate; W shows the lower ange, in the edge of which are made the depressions, 1 2 -3 4 5 6 7 8, &c., for the purpose of allowing the water to pass into the annular space when'the piston is forced downward. By this arrangement the projections, I J K L M N O P, Sto., provide a suicient support for the packing when the piston is being forced upward, carrying the raising column of water. Z represents the upper ange through which are made the holes bounded by the lines, F in order that the desired quantity of water may pass to the top of the piston; D represents the ribs projecting outward from the shell of the piston, in order to keep the packing in the proper place, and allow su'icientspace for the water to'pass between the inner surface of the packing and the back of the annular space.` The piston-rod, E, can be put through the hole, G, and secured by the pin shown at S.

Operation.

In fig. 1, the packing is in the position it will occupy when the piston is forced downward, which will allow the water to readily pass through the holes F, fig. 3. The red lines, W', represent the position which the packing, B, will occupy when the piston is forced upward, carrying the water in the usual manner.

Having thus fully described my device, I do not claim-the two-part packing B, operating in the enlarged annular space; but what I do claim, and desire to secure by Letters Patent of the United States, is-

i The combination and arrangement of depressions 1 2 3 4 5 6 7 8, flange W, loose packing B, ribs D, and openings F, substantially as set forth and described.

E. B. WINSHIP.

v Witnesses:

Gro. L. GHAPIN, A. Harwaan. 

